An ink jet printhead with an array of nozzles 3. In one example, the building product includes a siding product including a first side and a second side. The capacitance-inductance combinations are arranged to be resonant at one or more frequencies at which radio frequency energy is generated by the circuit units. The plurality of cable hangers have one or more cable supports configured to hold at least one of the plurality of cables and a support configured to couple the cable support to the building. The invention is also directed to the use of compounds of formula prepared by the processes of the invention as cytotoxins for cancer therapy and as prodrugs for gene-directed enzyme-prodrug therapy and antibody-directed enzyme-prodrug theraphy. The light guiding pipe is adhered to the housing by the adhering member, with the light guiding pipe inserted in the stepped fixing hole and the assembly surface resisting against the fixing surface.